The deployment came a day after it was revealed that an anonymous donor offered up a $100,000 reward in exchange for Lisa Irwin's safe return.

Several videos featuring the baby were also posted on YouTube last week.

Baby Lisa disappeared after being put to sleep in her crib by her mother, Deborah Bradley, on Oct. 3. Her father, Jeremy Irwin, has said he discovered she was missing when he returned home from work late that night.

The front door to the home was not locked and a window was open, but little evidence has been found at the house to indicate who may have taken the child.

Several searches, including one in a nearby well, have failed to turn up any trace of her.

The parents have given numerous TV interviews since their daughter vanished, and for a time reportedly refused to cooperate with police. They have never officially been called suspects by authorities.